1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Svetach [21]
3 years ago
6

A particular sample of air is 2.5% water vapor express the concentration of water vapor in parts per million

Chemistry
1 answer:
Inessa05 [86]3 years ago
7 0

Answer:

                     25000 ppm

Explanation:

<em>Parts Per Million </em>is defined as the number of parts of a solute per one million parts of a solution.

                  ppm  =  (Weight of Solute / Weight of Solution) × 10⁶   ---(1)

Let us suppose that the air (solution) weights 100 grams, then 2.5 % of water vapors will have following mass,

Mass of Vapors g / 100 g × 100  =  2.5

Or,

Mass of Vapors = 2.5 × 100 / 100

Mass of Vapors  =  2.5 g

Hence, mass of water vapors is 2.5 g.

Now, putting mass of water vapors and air in eq. 1,

                  ppm  =  (2.5 / 100) × 10⁶

                 ppm  =  25000

You might be interested in
If there was a high pressure system in your area and a bunch of clouds were blown in from a different direction, how would the p
Ilia_Sergeevich [38]
Idk but I had to “answer a q”
3 0
3 years ago
Explain why the quantum number set (3, 2, 3, -½) is not possible for an electron in an atom
Triss [41]
Ok the ML (the 3rd number) is not legit because the ML value can only be from -L to L (the second value)
7 0
3 years ago
Part a the sun produces energy via fusion. one of the fusion reactions that occurs in the sun is 411h→42he+201e how much energy
Orlov [11]
The equation for the nuclear fusion reaction is,
4 ¹₁H → ₂⁴He + 2 ₁⁰e
Calculation of mass defect,
Δm = [mass of products - mass of reactants]
      = 4(1.00782) - [4.00260 + 2(0.00054858)]
      = 0.0275828 g/mole
Given that,
Mass of Hydrogen-1 = 2.58 g
The no. of moles of ₁¹H = 2.58 g / 1.00782 = 2.56 moles
Therefore, the mass defect for 2.58 g of ₁¹H is, 
= 2.56 moles * (0.0275828 g / 4) = 0.01765 x 10⁻³ kg
Energy for (0.01765 x 10⁻³ kg) is, 
= (0.01765 x 10⁻³ kg) (3.0 x 10⁸)² = 1.59 x 10¹² J
4 0
3 years ago
Read 2 more answers
If two separate containers A and B have the same volume and temperature, but container A has more gaseous molecules than B, then
topjm [15]

Answer:

Higher pressure, is the right answer.

Explanation:

The A will have a higher pressure. Since we have given the volume and temperature is same in both containers A and B. Below is the calculation for proof that shows which container has the higher pressure while keeping the volume and temperature the same.  

So, \ V_A = V_B \\\frac{n_A T_A}{P_A} = \frac{n_B T_B}{P_B} \\Here, \ T_A = T_B \\P_A = \frac{n_A}{n_B} \times P_B \\\frac{n_A}{n_B} > 1 \\\frac{P_A}{P_B} > 1 \\P_A > P_B \\

Therefore, the container “A” will have higher pressure.

8 0
3 years ago
Selah is making a mobile of an atom of beryllium to hang from the ceiling in her science class. She uses a clear plastic bag for
mel-nik [20]

Answer:

See explanation

Explanation:

The question is incomplete because the images of the models are absent. However, i will try to give you a general description of what the correct answer should be.

Beryllium is a member of group 2 in the periodic table. Beryllium has an atomic number of 4. This implies that it has four protons in its nucleus and four electrons in its shells. In a neutral atom, the number of electrons on the shells is equal to the number of protons in the nucleus.

The electronic configuration of Beryllium is 1s2 2s2. This implies that it should have two shells each containing only two electrons each.

Since we are using white foam balls for protons and black foam balls for neutrons, the clear plastic will contain four white foam balls and five  black foam balls since the mass number of beryllium is 9 and number of neutrons = mass number - number of protons.

Four blue foam balls hanging from strings will represent the electrons around the nucleus.

Any model that corresponds to the description above is the correct answer.

7 0
3 years ago
Other questions:
  • When determining the formula for a compound, it is important to know the valence numbers of each element. Suppose you want to wr
    9·1 answer
  • Turgor, an internal stimulus, refers to —
    7·1 answer
  • All of the following are properties of bases except
    8·2 answers
  • what is the molarity of a CsOH solution if 30.0 mL of the solution is neutralized by 26.4 mL 0.250M HBr solution
    14·1 answer
  • 0.398 mol AgNO3 and 2.73 mol NH3 were added to enough water to give 1.00 L of solution at 25 °C. Calculate the equilibrium conce
    5·1 answer
  • What is the mass of 14.10 moles of Li2O?
    10·1 answer
  • A. During which segments does the kinetic<br> energy decrease?
    7·1 answer
  • If we use 18 moles of H2 how many moles of H2O do we make? Use this chemical equation: 6H2 + O2 → 3H2O
    13·2 answers
  • What is the atomic mass for cl
    8·1 answer
  • An empty beaker has a measured mass of 27.234 g. When some salt is added to the beaker, the combined mass is 35.9564 g. Calculat
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!